quote:

ORIGINAL: superdak05

i had the platnum plugs for about 1 month and got rid of them. i lost between 45/50 miles to a tank of gas. went back to the factory champions and got my milage back but every now and then the truck would idle funny at a stop sign or traffic light. swithced out the factory champions for the autolite 3293 and what a difference. much smoother idle and still the same great gas milage. other thing i noticed is with the a/c on and you stomp on it the truck doesnt hesitate like the champions did. squats the ass end and away you go. these are good plugs and will be keeping them all 8 at walmart were 10.50. the plats were like 3.50 a plug for garbage.

quote:

ORIGINAL: batman13
i liked the first clinton,
he shot from below the belt.....

quote:

ORIGINAL: ChadJK

Does anyone index their plugs?  Is there any real performance increase from doing so?

For those who don't know what spark plug indexing is (I didn't and had to look it up):

Generally speaking, the idea of indexing is to position the spark plug so that its gap is facing the center of the cylinder, angled slightly toward the exhaust valve—the most common arrangement. (Some engines work better with other gap locations.) This is important because, as the piston approaches TDC, the air/fuel charge is being compressed. The charge or "mixture" is being forced toward the area of the spark plug—and normally, the exhaust valve. The true speed of this force inside the combustion chamber is extremely fast. Some experts speculate that it surpasses supersonic speeds.

Because of this, the spark generated from the plug should be in a "position" to create the best possible flame front. Looking at a typical side-gap spark plug, you'll note that the electrode can actually block the flame process. On the other hand, if the electrode gap faces the on-rushing air/fuel charge, it stands a much better chance of igniting a flame front.